PURPOSE
Endoscopic submucosal dissection (ESD) is a very useful endoscopic technique, making it possible to perform en bloc resection regardless of lesion size. Since the introduction of ESD at our hospital, we have performed 1,000 colorectal ESDs during 56 months. The purpose of this study was to evaluate the clinical outcomes of our colorectal ESD… (More)

The purpose of this study was to determine the precision and accuracy of facial soft tissue measurement using personal computer (PC)-based multiplanar reconstructed (MPR) computed tomography (CT) images and to evaluate the effect of the various CT scanning protocols on the facial soft tissue thickness measurement. Thirteen different CT imaging protocols… (More)

BACKGROUND
The possible risk of colonic perforation during endoscopic submucosal dissection (ESD) for colorectal tumors is a barrier to wide application. This retrospective study was performed to evaluate the risk and the predictive factors for perforation during ESD procedure.
METHODS
Between October 2006 and November 2010, a total of 499 consecutive… (More)

PURPOSE
To compare the higher-order aberrations (HOAs) after laser-assisted subepithelial keratectomy (LASEK) using a conventional optical zone and a larger zone with a blend zone.
SETTING
Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea.
METHODS
In this prospective study, 19 patients with a manifest refraction of -3.00… (More)

PURPOSE
To describe two cases of bacterial keratitis with atypical mycobacteria after laser in situ keratomileusis (LASIK).
METHODS
Two cases of non-tuberculous mycobacterial keratitis occurred in the interface between the stromal bed and flap, 20 days and 14 days after LASIK. The keratitis progressed slowly and worsened after attempts were made to remove… (More)

In anesthetised animals basal pancreatic blood flow, both in the normal gland and in acute pancreatitis, and basal renal blood flow have been shown to be dependent on prostaglandins (PGs). However, in conscious dogs it has been demonstrated that the reliance of basal renal blood flow on PGs is only apparent, and probably due to the effect of anesthesia and… (More)